Ever dreamt of building your own car, maybe even designing the bodywork and literally bolting it together yourself? Then the Open Source Vehicle – or OSVehicle – is here to help. This is quite literally a flat-pack car.

The 2014 Chevrolet Spark EV has been named the most fuel-efficient vehicle by the EPA and the Department of Energy in a new ranking for 2014. The Spark EV returns a combined 119 mpg equivalent, achieving 128 mpg in the city and 109 mpg on the highway. Chevrolet's pure-electric hatch displaced last year's chart topper, the Scion 2013 iQ EV, with its 121 mpg equivalent rating, but the Scion is not offered for the 2014 model year, so it didn't make the list for the U.S.

Many landmarks have been established here at the 2013 Frankfurt Motor Show – and Volkswagen is one manufacturer that’s stealing headlines with its new Golf R. This is the most powerful production Golf ever, packing 300hp and four-wheel drive. Amazingly, it’s also more efficient than its predecessor.